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222-9+11+12:2*14+14 = ? ( )

Toán Lớp 8: (x+1)^2-(2x-1)^2 phân tích nhân tử

Toán Lớp 8: (x+1)^2-(2x-1)^2 phân tích nhân tử

Comments ( 1 )

  1. (x+1)^2-(2x-1)^2
    =(x+1-2x+1)(x+1+2x-1)
    =(-x+2)3x
    Hằng đẳng thức 3

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222-9+11+12:2*14+14 = ? ( )

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